Troubleshoot blank page on first load

[GretaCB]

Problem:

• After updating the site, the first site request will result in a blank page. Site contents will show after a hard refresh
• Behaviour seen in Firefox and Chrome

Debugging

• View Source is showing the expected HTML
• The dev console is running InstallingWorker():

When InstallingWorker() finishes, it should print "Content is now available offline!"...but it's not.

• Also interesting is the 404 error:

  Uncaught (in promise) Error: 404 page could not be found. 

• After some googling, looks like it could be related to gatsby's offline plugin:

  • https://github.com/gatsbyjs/gatsby/issues/11006
  • https://github.com/gatsbyjs/gatsby/tree/master/packages/gatsby-plugin-offline#notes
  • This is using a Workbox ServiceWorker

[GretaCB]

Can't replicate. Will reopen if I hit this again.